Liferay is an open-source content management system written in
Java. It is used by a number of high traffic sites, as this survey suggests.

Clustering Liferay and other components such as the database and
the file system is a good way to handle the performance
requirements of a high traffic site. The latest Liferay version
has introduced features that simplify clustering, such as
built-in support for Ehcache clustering, Lucene replication,
read/write splitting capabilities for database (in case if you
run on master-slave architecture) and support for various file
systems for the portal repository.

In this post, we are going to show you how to cluster Liferay in
a multi-node load-balanced setup. The database backend will be
based on Galera Cluster for MySQL, and the file …

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